Method of causing artificial respiration.



J. H. DRKGER. METHOD OF GAUSING ARTIFICIAL RESPIRATION.

APPLIOATION FILED SEP.T.'7, 1910.

Patented Nov. 12, 1912.

l imitate natural breathing.

JOHAN N HEINRICH DRAGER, OF L'UBEOIL GERMANY.

METHOD OF CAUSING: ARTIFICIAL RESPIRATION.

inaaos i.

Specification of Letters Patent.

resented Nov.12,1912.

Original application filed October 1, 1908, Serial No. @5318. Dividedand this application filed September 7,

To-all whom it may concern:

Be it knownthat l. JOHANN HEINRICH llnionn, a subject of theGermanEmperor,

and resident of Liibeck, in the German Bin-- i pirc, have invented a newand. usetul l d ethod of Causing Arti cial Respiration,

' of which the following is a specification.

The present invention is a division of my application #455,718, filedOct. 1, 1908 and 113 relates to a new method of causing-peopleartificially to breathe. It has been suggest ed heretofore to force airor other suitable gas into the breathing organs of the body and then todraw out again by suction to According to the present invention humanbeings ar caused to breathe by connecting the breathing organs with asource of compressed gas by means of a conduit and periodically con- 29necting this conduit with the outside air in such manner, as to make useof the compressed gas to create a sucking action and thereby to suck theair or gas from the said organs into the open air. Thus the same gasdriving means is used both for producing the inhaling as well as theexhaling. Reversible valves or the. like can be cmploycd to divert thecurrent in the way specified and any suitable driving means can be madeuse of to constantly reciprocate the said valves or the like at regularintervals. Thus the change from forcing to sucking and vice versa isobtained automatically, so that the space of time, within which theinhaling and the exhaling is to be carricd on, can be accuratelyprescribed and strictly observed.

If desired the pressure which naturally increases in the conduit, whenthe lungs are filled and a back pressure sets in, can be made use of toautomatically divert the current of gas, so as to allow the suckingactlon to take place. In a similar manner the suclc' ing action when thelungs are exhausted and thus a vacuum is produced, can be made use of toautomatically divert the current again so as to allow compressed air toagain enter the lungs.

Means to carry out the methods described 9 above are shown in theaccompanying draw ing, which is an elevation of an apparatus forautomatically changing the position of the air or conducting means.

lileans are provided to utilize the pressure of the gas to automaticallychange the posi- Serial No. 580,942".

tion of the valve or cock for changing the course of the air or gas whenthe breathing organs of the human being are nearly filled or nearlyexhausted. This mcthod of automatically changing or reversing the courseof the air or gas, may be carried out, for instance, by the apparatusshown, and will be understood from the following description.

The air or gas conducting means used in this apparatus consists of thepipes e and f branching cit from a pipe h in which an abutment 7e, isfixed. Two flexible pipes g and are made use of to connect the pipe li"with the mask 3. The pipe 6 is provided with. throttling valve. A pipe 1branches 01? from the pipe 5 near its point of connection with the pipe72. .This pipe r leads to a bellows 1 the object of which is to move thepistons 17", when it is necessary to change the course of the air. Thebellows r may be connected directly with the piston rod 2' or by links mand n and a lever Z hereinafter more fully described to operate thepistons 1 In the position shown, air or a mixture of oxygen and air isdriven to the lungs desig* nated by 41?. At the same time a portion ofthe air is led to the bellows r by way of the pipe *1, without affectingthe bellows on account of being too weak. When, however, the lungs arefilled, the stream of air finds suiiicicnt resistance to increase thepressure in the bellows 7"", which is now filled and acts on the pistonsi to change their position. The result is that a sucking action takesplace to draw air from the lungs and also from the bellows. As long asthe lungs are able to give air, the sucking action does not increase tosuch an extent as to materially decrease the pressure in the bellows. il hen, however, the lungs are exhausted the sucking action becomesstronger and the bellows contracts, so as to draw the piston into thefirst position. The operation is then repeated. It is not necessary 'toconnect the bellows with the pipe 9 near the pipe k as shown, but it maybe connected with the pipe k itself, close to the pipe 9 or at someother place oi. the pipe 9 or with the mask, or even with the pipe g;

If it is desired to impart a more sudden or quick movement to thepistons than is possible by the means above described, the links of andn are provided with slots m and a respectively, into which pins on thepiston rod 2' and lever Z project; which latter is pivoted to some fixedpolnt by a pin Z A second lever g is pivoted to a fixed point by a pin gone end of this lever g being acted upon by a spring p the tension ofwhich may be regulated by a screw 79 The other end of the lever qcarries a wedgeshaped cam 0 having two surfaces 0 and 0 arranged at'anangle to one another, either of which bears against the free end of the.lever Z by the pressure exerted by the spring 12 The bellows is thenexpanded or contracted so long as the exhaling or the inhaling takesplace. When the pressure or the vacuum in the bellows surpasses acertaln degree, so as to move the lever Z beyond its from a suitablesource of compressed gas until a back pressure of said gas sets in, whenthe lungs have been filled and diverting the current of gas by saidpressure to cause it to move in adirection away from the mouth of thehuman being so as to produce a suction to discharge the air from thelungs.

2. The method of producing artificial respiration which comprisesfilling the lungs from a suitable source of compressed gas until a backpressure of said gassets in, when the lungs have been filled anddiverting the current of gas by said back pressure to cause it to movein a direction away from the mouth of the human being so as to produce asuction to discharge the air from the lungs and again causing thecompressed gas to enter the lungs, when they have been emptied due tothe decreased gas pressure.

JOHANN HEINRICH DRAGER.

Witnesses:

J 011s. VVULF, FRIEDR. PLATH.

